1 files changed, 115 insertions, 0 deletions

diff --git a/drivers/video/tegra/host/nvhost_intr.h b/drivers/video/tegra/host/nvhost_intr.h
new file mode 100644
index 00000000000..26ab04ebd4a
--- /dev/null
+++ b/drivers/video/tegra/host/nvhost_intr.h
@@ -0,0 +1,115 @@
+/*
+ * drivers/video/tegra/host/nvhost_intr.h
+ *
+ * Tegra Graphics Host Interrupt Management
+ *
+ * Copyright (c) 2010-2012, NVIDIA Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __NVHOST_INTR_H
+#define __NVHOST_INTR_H
+
+#include <linux/kthread.h>
+#include <linux/semaphore.h>
+#include <linux/interrupt.h>
+
+struct nvhost_channel;
+
+enum nvhost_intr_action {
+        /**
+         * Perform cleanup after a submit has completed.
+         * 'data' points to a channel
+         */
+        NVHOST_INTR_ACTION_SUBMIT_COMPLETE = 0,
+
+        /**
+         * Save a HW context.
+         * 'data' points to a context
+         */
+        NVHOST_INTR_ACTION_CTXSAVE,
+
+        /**
+         * Wake up a  task.
+         * 'data' points to a wait_queue_head_t
+         */
+        NVHOST_INTR_ACTION_WAKEUP,
+
+        /**
+         * Wake up a interruptible task.
+         * 'data' points to a wait_queue_head_t
+         */
+        NVHOST_INTR_ACTION_WAKEUP_INTERRUPTIBLE,
+
+        NVHOST_INTR_ACTION_COUNT
+};
+
+struct nvhost_intr;
+
+struct nvhost_intr_syncpt {
+        struct  nvhost_intr *intr;
+        u8 id;
+        u8 irq_requested;
+        u16 irq;
+        spinlock_t lock;
+        struct list_head wait_head;
+        char thresh_irq_name[12];
+};
+
+struct nvhost_intr {
+        struct nvhost_intr_syncpt *syncpt;
+        struct mutex mutex;
+        int host_general_irq;
+        bool host_general_irq_requested;
+};
+#define intr_to_dev(x) container_of(x, struct nvhost_master, intr)
+#define intr_op(intr) (intr_to_dev(intr)->op.intr)
+#define intr_syncpt_to_intr(is) (is->intr)
+
+/**
+ * Schedule an action to be taken when a sync point reaches the given threshold.
+ *
+ * @id the sync point
+ * @thresh the threshold
+ * @action the action to take
+ * @data a pointer to extra data depending on action, see above
+ * @waiter waiter allocated with nvhost_intr_alloc_waiter - assumes ownership
+ * @ref must be passed if cancellation is possible, else NULL
+ *
+ * This is a non-blocking api.
+ */
+int nvhost_intr_add_action(struct nvhost_intr *intr, u32 id, u32 thresh,
+                        enum nvhost_intr_action action, void *data,
+                        void *waiter,
+                        void **ref);
+
+/**
+ * Allocate a waiter.
+ */
+void *nvhost_intr_alloc_waiter(void);
+
+/**
+ * Unreference an action submitted to nvhost_intr_add_action().
+ * You must call this if you passed non-NULL as ref.
+ * @ref the ref returned from nvhost_intr_add_action()
+ */
+void nvhost_intr_put_ref(struct nvhost_intr *intr, void *ref);
+
+int nvhost_intr_init(struct nvhost_intr *intr, u32 irq_gen, u32 irq_sync);
+void nvhost_intr_deinit(struct nvhost_intr *intr);
+void nvhost_intr_start(struct nvhost_intr *intr, u32 hz);
+void nvhost_intr_stop(struct nvhost_intr *intr);
+
+irqreturn_t nvhost_syncpt_thresh_fn(int irq, void *dev_id);
+#endif